Controlling a packet flow from a user equipment

ABSTRACT

A method and User Equipment (UE) for limiting excessive packet flow from the UE to a communication network. The UE receives from the network, an instruction to activate a logic parameter for controlling the packet flow from the UE to the network. In response to receiving the instruction, the UE requests configuration of a network connection for transmitting packets to the network according to the logic parameter. The UE then requests deactivation of all other network connections upon successful configuration of the network connection for transmitting packets to the network according to the logic parameter.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of co-pending U.S. patent applicationSer. No. 13/608,484 filed on Sep. 10, 2012, which is a continuation ofU.S. patent application Ser. No. 12/694,378 filed on Jan. 27, 2010, nowU.S. Pat. No. 8,289,848, which claims the benefit of U.S. ProvisionalApplication No. 61/149,183 filed Feb. 2, 2009, the contents of which areincorporated by reference herein in their entireties.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not applicable

REFERENCE TO SEQUENCE LISTING, A TABLE, OR A COMPUTER PROGRAM LISTINGCOMPACT DISC APPENDIX

Not applicable

BACKGROUND

The present invention relates to radio telecommunication systems. Moreparticularly, and not by way of limitation, the present invention isdirected to a method, device, and node for controlling a packet flowfrom a User Equipment (UE) in a radio telecommunication system.

Today, several actors are involved in managing the software and hardwareof a UE, such as a mobile telephone or other communication device in awireless communication system. The software can be applications,services, and modules, including the operating system stored in and usedby the UE. The UE's manufacturer typically installs a collection ofsoftware in the UE at the time the device is manufactured. Later, an enduser may modify the UE's software by downloading to the UE, applicationsand the like from different sources via, for example, the Internet. TheUE's manufacturer, the operator of the communication system to which theUE is subscribed or in which the UE is visiting, and/or an authorizedthird party, depending on business agreements, may also remotely modifypart or all of the UE's software.

After such modifications and in other instances, the UE may behaveimproperly. From a system operator's point of view, for example,improper behavior may include the UE's diminishing the capacity of thecommunication system by increasing the number of control or othermessages exchanged with the system. Improper UE behavior can arise in anumber of ways, such as unexpected interactions between software modulesin the UE, malicious software modules, and the like. A user mightdownload a malicious or malformed application such as a Javaapplication, which interacts with the network-protocol stack throughopen Application Programming Interfaces (APIs) in the UE. As a result,the UE may repeatedly send service requests to an operator's network.

Techniques for dealing with improper UE behavior by disabling servicesto a UE have been discussed in standardization organizations such as theThird Generation Partnership Project (3GPP). The 3GPP promulgatesspecifications for the GSM telecommunications system and itsenhancements such as Enhanced Data Rates for GSM Evolution (EDGE), theuniversal mobile telecommunications system (UMTS), the Long TermEvolution (LTE) access network, and systems employing widebandcode-division multiple access (WCDMA).

The Third Generation Partnership Project Technical Specification, 3GPPTS 24.305, describes procedures for managing settings of the UE forremotely disabling selected UE capabilities, used over a 3GPP access,i.e., a circuit-switched (CS) and packet-switched (PS) domain overGERAN/UTRAN radio access.

The Open Mobile Alliance (OMA) has developed specifications for DeviceManagement (DM) of communication devices, and versions 1.1.2 and 1.2 ofthose specifications define a protocol for managing configuration, data,and settings in communication devices. OMA standards and otherinformation are publicly available through the OMA organization. OMA DMcan be used to manage the configuration and Management Objects (MOs) ofUEs from the point of view of different DM Authorities, includingsetting initial configuration information in UEs, subsequently updatingpersistent information in UEs, retrieving management information fromUEs, and processing events and alarms generated by UEs. An MO isgenerally a software object that may be written, for example, accordingto SyncML, which is a mark-up language specification of an XML-basedrepresentation protocol, synchronization protocol, and DM protocol,transport bindings for the protocols, and a device description frameworkfor DM. Using OMA DM, third parties can configure UEs on behalf of endusers. A third party, such as a network operator, service provider, andcorporate information management department can remotely set UEparameters and install or upgrade software through suitable MOs in theUE.

The Evolved Packet System (EPS) has been defined since 3GPP release-8 asa system for mobile communication using packet data over an evolved GPRSnetwork. The core network is an evolved UMTS packet core network and theradio access network may be an evolved UTRAN (E-UTRAN), a non-3GPPaccess network (for example WLAN), or a combination of both. The 3GPPTechnical Specifications, 3GPP TS 23.401 and 3GPP TS 24.301, describethe GPRS enhancements for E-UTRAN access.

To stay registered in the EPS, an EPS bearer must be retained, asotherwise the EPS mobility procedures will be rejected by the EPSnetwork, as described in 3GPP TS 23.401. Also, as described in 3GPP TS24.305, the OMA DM server controlling the Selective Disabling of a 3GPPUE Capabilities Management Object (SDoUE MO) needs to be able to pushdown updates of the MO to the UE. The push of MO updates using SMScannot always be assumed to be available unless both the UE and thenetwork support SMS using CS Fallback capabilities described in 3GPP TS23.272, and even then a PS access is required to be open. Thus, the MOupdate may need to be sent over the PS access. Therefore, the PS accessopen in the UE needs to be accessible by the OMA DM server.Consequently, an EPS bearer towards a Packet Data Network (PDN) needs tobe retained until the software in the UE has been updated. This mayimply a risk of flooding the network with malicious traffic if the UEhas been hacked.

BRIEF SUMMARY OF THE INVENTION

The present invention solves or at least mitigates the risk of floodingthe radio access network and core network with malicious UE-initiatedtraffic. The invention enables the UE to retain a PDN connection with anEPS bearer open that enables the OMA DM server to communicate with theUE and ensure the EPS mobility procedure works. In one embodiment, theinvention provides the operator with the ability to provision an AccessPoint Name (APN) and a Traffic Flow Template (TFT) to be used until theoperator has enabled UE-initiated EPS services again.

Thus, in one embodiment, the present invention is directed to a methodin a UE for limiting packet flow from the UE to a communication network.The method includes the steps of receiving from the network, aninstruction to activate a logic parameter for controlling the packetflow from the UE to the network; requesting configuration of a networkconnection for transmitting packets to the network according to thelogic parameter; and requesting deactivation of all other networkconnections. The logic parameter may be in a management object, and maybe pre-stored in the UE, or may accompany the instruction.

In another embodiment, the present invention is directed to a UE thatincludes means for receiving from a communication network, aninstruction to activate a logic parameter for controlling a packet flowfrom the UE to the network; means for requesting configuration of anetwork connection for transmitting packets to the network according tothe logic parameter; and means for requesting deactivation of all othernetwork connections.

In another embodiment, the present invention is directed to a devicemanagement server in a communication network for remotely controlling apacket flow from a mobile communication device. The server includesmeans for storing a management object that includes at least one of: aflag, a defined Access Point Name (APN), and a logic parameter forcontrolling the packet flow from the mobile communication device to thenetwork; and means for downloading the management object to the mobilecommunication device. The flag, when downloaded to the mobilecommunication device, causes the device to activate the logic parameterin the management object or to activate a stored logic parameter in thedevice. The defined APN, when downloaded to the mobile communicationdevice, causes the device to send a request to establish a newconnection to the network on which packet flow from the device iscontrolled according to the logic parameter.

In another embodiment, the present invention is directed to a PacketData Network (PDN) Gateway. The PDN Gateway includes means for receivingfrom a UE, a PDN connectivity request to establish a new PDN connection;and means for limiting a packet flow from the UE on the new PDNconnection according to defined parameters.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

In the following section, the invention will be described with referenceto exemplary embodiments illustrated in the figures, in which:

FIG. 1 is a tree diagram of an enhanced Selective Disabling of 3GPP UECapabilities Management Object (SDoUE MO+) in an exemplary embodiment ofthe present invention, with nodes added by the present inventionindicated in boldface type;

FIG. 2 is a flow chart illustrating the steps of an exemplary embodimentof the method of the present invention; and

FIG. 3 is a simplified block diagram of a User Equipment (UE) andassociated nodes in a network in an exemplary embodiment of the presentinvention.

DETAILED DESCRIPTION OF THE INVENTION

For economy of explanation, this application focuses on wirelesscommunication systems that comply with specifications promulgated by the3GPP, but it should be understood that the principles described in thisapplication can be implemented in other communication systems. It willalso be understood that this description is written in terms of OMA DM,but this description should not be interpreted as being limited to OMADM. Independent of the mechanism used to disable or enable services in aUE, it is advantageous for the UE to be selectively controllable in astandardized way.

The present invention updates 3GPP TS 24.305 procedures to handle thedifference between EPS (3GPP TS 24.301) and GPRS (3GPP TS 24.008). Thedisabling of EPS is different than for GPRS. In EPS, the UE can requestprocedures for EPS contexts, but only the network can initiate them(this, in normal cases, includes the case of deactivation). Therefore,in exemplary embodiments of the present invention, the operator isprovided with the ability to disable mobile-requested EPS SessionManagement (SM) procedures. In one embodiment, a logic parameter isdownloaded to the UE, causing the UE to request a new PDN connectiontowards the network with either a defined APN or no APN if the definedAPN is not available for the UE. The UE requests deactivation of allpreviously existing PDN connections, and utilizes a particular trafficflow mapping for an EPS context that provides the network operator withcontrol of packet access from UE applications.

In another embodiment, the logic parameter causes the UE to send thedefined APN in the request for a new PDN connection. The defined APNcauses the network to establish the new PDN connection with a particularPDN GW, configured to control the traffic flow from the UE in accordancewith the particular traffic flow mapping. Optionally, the PDN GW maypush traffic flow mapping parameters to the UE.

It should be noted that in different configurations of the 3GPP networkarchitecture, the gateway may utilize either the GPRS Tunneling Protocol(GTP) or the Proxy Mobile IP (PMIP) protocol as a network mobilityprotocol. When GTP is utilized, it is the PDN GW that may push trafficflow mapping parameters to the UE. When PMIP is utilized, the Serving GWmay provide this part of the PDN GW functionality. Thus, when the PDN GWis referred to herein, the term is intended to include the functionalityof pushing traffic flow mapping parameters to the UE, whether the pushis made by the PDN GW or by the Serving GW.

In another embodiment, the logic parameter causes the UE to utilize anexisting PDN connection towards the network rather than establishing anew connection. Again, the UE requests deactivation of other PDNconnections, if any, and utilizes a particular traffic flow mapping foran EPS context that provides the network operator with control of packetaccess from UE applications.

In another embodiment, the OMA DM server may know that the UE includesan internal application to ensure that only the application(s)controlling the connection towards the OMA DM server, and potentiallyemergency calls, are allowed access to use the PS connection. In suchcase, the OMA DM server does not have to download any APN or logicparameter to the UE. Instead, the OMA DM server may send only a flaginstructing the UE to activate the internal application.

Once the network operator has control of packet access from UEapplications, the operator can prevent a misbehaving UE from floodingthe network with malicious or erroneous traffic. As part of thecorrection process, a device management server such as an OMA DM servercan push corrective software to the UE to correct or replace a corruptedapplication causing the misbehavior. In addition, the logic parametermay also limit the packet flow to a maximum data rate or a maximumpacket size.

FIG. 1 is a tree diagram of an enhanced Selective Disabling of 3GPP UECapabilities Management Object (SDoUE MO+) in an exemplary embodiment ofthe present invention, with nodes added by the present inventionindicated in boldface type. Those skilled in the art will understandthat the modified SDoUE MO+ is a software module that includesparameters that can be used to manage settings of the UE for remotelydisabling and enabling selected capabilities of the UE. The identifierfor an existing SDoUE MO is “urn:oma:mo:ext-3gpp-sdoue:1.0”. The OMA DMAccess Control List (ACL) property mechanism as standardized (seeEnabler Release Definition OMA-ERELD-DM-V1_2 [8]) may be used to grantor deny access rights to OMA DM servers in order to modify nodes andleaf objects of the SDoUE MO.

In an exemplary embodiment of the present invention, the existing SDoUEMO is enhanced to support the case of EPS with the addition of thefollowing new nodes: EPS_SM_EPS, APN, TrafficMappingInfo,NumberOfPacketFilters, and PacketFilterList. When downloaded to the UE,the enhanced SDoUE MO+ adds at least the following capabilities to adevice management server such as an OMA DM server:

1. The capability to separately disable UE-initiated EPS procedures suchas UE-requested PDN connectivity, UE-requested bearer resourcemodification, and UE-requested PDN disconnect, as well as to providerestriction to EPS services.

2. The capability to provision a special APN to which the UE can set upa PDN connection. This enables the PDN Gateway (PDN GW) to restrict theUE traffic to only traffic necessary for communication with the OMA DMserver and potentially IP Multimedia Subsystem (IMS) emergency calls.

3. The capability to locally install the essential Uplink Traffic FlowTemplate (UL TFT) parameters in the UE to restrict the UE's ability tosend IP packets other than those allowed by the operator, for examplethose required towards the OMA DM server.

If an APN is provided in the SDoUE MO+, the PDN connection may beestablished with a PDN GW that is pre-configured with TFT-typeinformation that can be set on the EPS bearer. However, if no APN isprovided, the operator may establish the PDN connection to another PDNGW utilizing a default APN.

With continuing reference to FIG. 1, the following paragraphs describeadditions required to the indicated sections of 3GPP TS 24.305 in orderto describe the new nodes and leaf objects of the enhanced SDoUE MO+management object:

/<X>/EPS_SM_EPS

The EPS Session Management (SM) procedures for EPS contexts (EPS_SM_EPS)interior node 11 is a flag indicating an operator's preference to enableor disable mobile-requested EPS SM procedures for EPS contexts, i.e.,UE-requested PDN connectivity, UE-requested bearer resourcemodification, and UE-requested PDN disconnect, as well as to providerestriction to EPS services.

The EPS SM procedures for EPS contexts are specified in 3GPP TS 24.301[5A].

-   -   Occurrence: ZeroOrOne    -   Format: bool    -   Access Types: Get    -   Values: 0, 1

0—Indicates that mobile-requested EPS SM procedures for EPS contexts areenabled and no restriction to EPS services applies.

1—Indicates that mobile-requested EPS SM procedures for EPS contexts aredisabled and restriction to EPS services applies.

/<X>/APN

The APN leaf object 12 provides the information of an access point name.

-   -   Occurrence: ZeroOrOne    -   Format: chr    -   Access Types: Get    -   Values: <Access point name>

The format of the APN is defined by 3GPP TS 23.003 [2A] in clause 9.

EXAMPLE: mycompany.mnc012.mcc340.gprs

/<X>/TrafficMapping Info

The TrafficMappingInfo interior node 13 is used to enable configuringthe minimum acceptable traffic flow template (TFT) parameters (packetfilters) for EPS context according to the operator's preference.

-   -   Occurrence: ZeroOrOne    -   Format: node    -   Access Types: Get    -   Values: N/A

The information provided by the TrafficMappingInfo interior node is usedby the UE only when the EPS_SM_EPS leaf value is set to “1”.

/<X>/NumberOfPacketFilters

The NumberOfPacketFilters leaf object 14 indicates the number of trafficfilters contained in the PacketFilterList leaf 15.

-   -   Occurrence: One    -   Format: int    -   Access Types: Get    -   Values: <Number of packet filters>

The NumberOfPacketFilters is an unsigned 8-bit integer, and the valuerange is defined as the number of packet filters parameter in thetraffic flow template information element (see subclause 10.5.6.12 in3GPP TS 24.008 [3]).

EXAMPLE: 3 (packet filters)

/<X>/PacketFilterList

The PacketFilterList leaf object 15 provides the information of avariable number of traffic filters.

-   -   Occurrence: One    -   Format: int    -   Access Types: Get    -   Values: <Packet filter list information>

The PacketFilterList is an unsigned 64-bit integer. The bit patternshall be encoded as the packet filter list parameter in the traffic flowtemplate information element (see subclause 10.5.6.12 in 3GPP TS 24.008[3]) with the least significant bit in the rightmost position of theinteger. For example, if the parameter is encoded into bits 6, 7, and 8in 3GPP TS 24.008 [3], then it must be encoded into bits 1, 2, and 3 inthis leaf.

FIG. 2 is a flow chart illustrating the steps of an exemplary embodimentof the method of the present invention. When the value of the EPS_SM_EPSleaf 11 is set to “1”, the method proceeds as follows:

At step 21, the OMA DM server sends the modified SDoUE MO+ to the UE. Atstep 22, the UE initiates a new UE-requested PDN connectivity proceduretoward the network as described in 3GPP TS 24.301 [6A]. At step 23, itis determined whether the APN leaf 12 exists in the modified SDoUE MO+.If the APN leaf 12 does not exist, the method moves to step 24 where theUE sends a PDN CONNECTIVITY REQUEST message without including any APN inthe message, and the network utilizes a default APN for establishing anEPS context with a PDN GW at step 25. However, if the APN leaf exists,the method moves instead to step 26 where the UE sends the PDNCONNECTIVITY REQUEST message and includes the value defined in the APNleaf as the APN in the message. At step 27, the network utilizes thedefined APN for establishing an EPS context with a PDN GW associatedwith the defined APN.

After successful completion of the UE-requested PDN connectivityprocedure at step 27, it is determined at step 28 whether theTrafficMappingInfo interior node 13 exists in the modified SDoUE MO+.The TrafficMappingInfo interior node, as shown in FIG. 1, provides atleast one logic parameter for controlling the packet flow from the UE.If the TrafficMappingInfo node does not exist, the method moves to step29 where the UE transmits packets on the new PDN connection withoutfiltering the packets. At step 31, the PDN GW associated with thedefined APN may optionally be configured to control the traffic flowfrom the UE or to download to the UE, a logic parameter for controllingthe traffic flow from the UE. At step 32, the UE utilizes the logicparameter (i.e., traffic mapping information filters) to limit packettransmissions on the EPS context established by the UE-requested PDNconnectivity procedure. Returning to step 28, if it is determined thatthe TrafficMappingInfo interior node does exist in the SDoUE MO+, themethod moves directly to step 32.

Furthermore, the UE continues to limit packet transmissions on the EPScontext in accordance with the logic parameter until the EPS_SM_EPS leafvalue is reset to “0”. The UE is however allowed to temporarily stopusing the traffic mapping information in the following cases:

-   -   upon receipt of an OMA DM notification message indicating that        the UE shall initiate an OMA DM session to the OMA DM server        that either had set the disable value of the EPS_SM_EPS leaf or        is the one stored in the AlertServerlD leaf; and    -   when the UE wishes to either establish an emergency call over        IMS (if the IMS_EmergencyCalls value is set to “0”) or send an        OMA DM generic alert message according to sub-clause 5.17A of        3GPP TS 24.305.

At step 33, the UE initiates the signaling procedure for UE-requestedPDN disconnection as described in 3GPP TS 24.301 [6A] of all previouslyexisting PDN connections, thus leaving only the new one, which wasestablished by the successful completion of the UE-requested PDNconnectivity procedure. At step 34, the EPS context provides the networkoperator with control of packet access from UE applications. As notedabove, in EPS, the UE can request procedures for EPS contexts, but onlythe network can initiate them (for normal cases, this includes the caseof deactivation). Therefore, in this exemplary embodiment of the presentinvention, the operator is provided with the ability to disablemobile-requested EPS Session Management (SM) procedures.

It should be noted that the invention is not restricted to a specificorder of the PDN connectivity request procedure and the deactivation ofexisting bearers; the only restriction is that the UE always need tokeep at least one PDN connection to avoid getting detached from the EPS.A different order may be required in case the UE and/or EPS is currentlyusing the maximum number of EPS bearers supported by the UE and/or theEPS (e.g., Mobility Management Entity (MME), Serving GW, or PDN GW). Forexample, the UE may receive a rejection of an initial PDN connectivityrequest, and in response, first deactivate one of the available PDNconnections to free up resources before initiating the PDN connectivityprocedure for the PDN connection to be used towards the OMA DM server.

FIG. 3 is a simplified block diagram of a UE 41 and associated nodes ina network 42 in an exemplary embodiment of the present invention. Forsimplicity, only those components in the UE and those nodes in thenetwork that are associated with the present invention are shown. Thenetwork includes a device management server such as an OMA DM Server 43,the operation of which may be controlled by a processor 44. A memory 45may store management objects such as the SDoUE MO+ of the presentinvention. An MO downloading unit 46 downloads the SDoUE MO+ 47 to theUE 41.

Receipt of the SDoUE MO+ in the UE causes a PDN connectivity requestunit 48 to initiate a new PDN connectivity procedure by sending a PDNCONNECTIVITY REQUEST message 49 to the network 42. The networkestablishes a new EPS Context 51 between the UE and a PDN GW 52. Uponestablishment of the new EPS Context, a previous PDN connectionsdeactivation unit 53 sends a PDN disconnection request 54 to the networkto disconnect any previously established PDN connections. This leavesonly the new EPS Context in place between the UE and the network, andpacket transmissions from the UE over this context are controlled by thelogic parameter (packet filters) in the SDoUE MO-F. Thus, the networkhas control of packet access through a packet filtering unit 55 ascontrolled by a processor 56 and applications 57.

In this manner, the present invention solves or at least mitigates therisk of flooding the radio access network and core network withmalicious UE-initiated traffic. The invention enables the UE to retain aPDN connection with an EPS bearer open until the software in the UE hasbeen updated.

As will be recognized by those skilled in the art, the innovativeconcepts described in the present application can be modified and variedover a wide range of applications. Accordingly, the scope of patentedsubject matter should not be limited to any of the specific exemplaryteachings discussed above, but is instead defined by the followingclaims.

The invention claimed is:
 1. A method in a User Equipment (UE) forrestricting packet flow transmission from the UE to a Packet DataNetwork (PDN), the method comprising the steps of: receiving by the UE,an instruction to restrict packet flow transmission from the UE to thePDN, wherein the UE has at least one previously existing PDN connection;in response to receiving the instruction, requesting by the UE,establishment of a new PDN connection in accordance with the receivedinstruction; upon establishment of the new PDN connection: requesting bythe UE, deactivation of the at least one previously existing PDNconnection; and utilizing the new PDN connection for packet flowtransmission from the UE to the PDN; wherein the step of receiving theinstruction includes receiving one of: a flag to activate a previouslyconfigured internal application that triggers the requesting steps, aflag to activate a logic parameter for restricting packet flowtransmission from the UE to the PDN, wherein the logic parameter hasbeen previously stored in the UE, or a logic parameter for restrictingpacket flow transmission from the UE to the PDN and a flag to activatethe logic parameter.
 2. The method as recited in claim 1, wherein the UEreceives the flag to activate the logic parameter previously stored inthe UE for restricting packet flow transmission from the UE to the PDN,and the logic parameter controls the UE to halt all applications exceptan application for communicating with a device management server and anapplication for sending emergency transmissions.
 3. The method asrecited in claim 1, wherein the UE receives the logic parameter forrestricting packet flow transmission from the UE to the PDN and the flagto activate the logic parameter, and the logic parameter and the flag toactivate the logic parameter are received by the UE from a devicemanagement server.
 4. The method as recited in claim 1, wherein the UEreceives the logic parameter for restricting packet flow transmissionfrom the UE to the PDN and the flag to activate the logic parameter,wherein: the UE receives the logic parameter from a PDN Gateway; and theUE receives the flag to activate the logic parameter from a devicemanagement server.
 5. The method as recited in claim 4, wherein the UEreceives the logic parameter from the PDN Gateway by performing thesteps of: receiving by the UE from the device management server, adefined Access Point Name (APN) for the new PDN connection; and sendingthe defined APN from the UE to the PDN in a request to establish the newPDN connection, the defined APN causing the PDN to establish the new PDNconnection to the PDN Gateway, which is configured to download the logicparameter to the UE.
 6. The method as recited in claim 5, wherein thedefined APN is either specified by the UE or selected as a default bythe PDN.
 7. A method in a User Equipment (UE) for restricting packetflow transmission from the UE to a Packet Data Network (PDN), the methodcomprising the steps of: receiving by the UE, an instruction to restrictpacket flow transmission from the UE to the PDN, wherein the UE has atleast one previously existing PDN connection; in response to receivingthe instruction, requesting by the UE, establishment of a new PDNconnection in accordance with the received instruction; uponestablishment of the new PDN connection: requesting by the UE,deactivation of the at least one previously existing PDN connection; andutilizing the new PDN connection for packet flow transmission from theUE to the PDN; wherein the step of requesting establishment of the newPDN connection includes sending from the UE to the PDN, a request toestablish the new PDN connection according to a logic parameter, whichis either stored in the UE or received with the instruction.
 8. Themethod as recited in claim 7, wherein the request to establish the newPDN connection is a request to reconfigure one of the previouslyexisting PDN connections according to the logic parameter, which iseither stored in the UE or received with the instruction.
 9. The methodas recited in claim 7, wherein a corrupted application in the UE causedexcessive packet flow transmission from the UE, which triggered the PDNto send the instruction to restrict packet flow transmission from the UEto the PDN, and the method further comprises the UE receiving softwarefrom the PDN to repair or replace the corrupted application.
 10. A UserEquipment (UE), comprising a processor coupled to a non-transitorymemory for storing computer program instructions, wherein when theprocessor executes the computer program instructions, the processorcauses the UE to: receive an instruction to restrict packet flowtransmission from the UE to the PDN, wherein the UE has at least onepreviously existing PDN connection; in response to receiving theinstruction, request establishment of a new PDN connection in accordancewith the received instruction; upon establishment of the new PDNconnection: request deactivation of the at least one previously existingPDN connection; and utilize the new PDN connection for packet flowtransmission from the UE to the PDN; wherein the UE requestsestablishment of the new PDN connection by sending from the UE to thePDN, a request to establish the new PDN connection according to a logicparameter, which is either stored in the UE or received with theinstruction.
 11. The UE as recited in claim 10, wherein the UE storesthe logic parameter for restricting packet flow transmission from the UEto the PDN in an inactive state until receipt of the instruction causesthe UE to activate the logic parameter.
 12. The UE as recited in claim10, wherein the UE is configured to request establishment of the new PDNconnection by sending a request to reconfigure one of the previouslyexisting PDN connections to provide a reconfigured PDN connection onwhich packet flow transmission by the UE is restricted.
 13. The UE asrecited in claim 10, wherein a corrupted application in the UE causedexcessive packet flow transmission from the UE, which triggered the PDNto send the instruction to restrict packet flow transmission from the UEto the PDN, and the UE is also configured to receive software from thePDN to repair or replace the corrupted application.
 14. The UE asrecited in claim 10, wherein a defined Access Point Name (APN) for thenew PDN connection is either specified by the UE or selected as adefault by the PDN.